IBASE MI805 - Manual (Page 56)

APPENDIX
52 MI805 User’s Manual
B. Interrupt Request Lines (IRQ)
Peripheral devices use interrupt request lines to notify CPU for the
service required. The following table shows the IRQ used by the devices
on board.
Level Function
IRQ0 System Timer
IRQ3 Serial Port #2
IRQ4 Serial Port #1
IRQ6 Serial Port #5
IRQ7 Serial Port #4
IRQ8 High precision event timer
IRQ10 Serial Port #3
IRQ11 Serial Port #6
IRQ22 High Definition Audio Controller